What is NAT?

NAT stands for Network Address Translation. It isproposed and described in RFC-1631 and is used for solving the IPaddress depletion problem. Basically, each NAT box has a tableconsisting of pairs of local IP addresses and globally uniqueaddresses, by which the box can "translate" the local IP addressesto global address and vice versa. Simply put, it is a method ofconnecting multiple computers to the Internet (or any other IPnetwork) using one IP address.